服务工作线程

¥Service Worker

服务工作线程是一个在浏览器后台运行的脚本，用于处理缓存和推送通知等任务。使用 Service Worker 适配器，你可以在浏览器中运行使用 Hono 作为 FetchEvent 处理程序制作的应用。

¥Service Worker is a script that runs in the background of the browser to handle tasks like caching and push notifications. Using a Service Worker adapter, you can run applications made with Hono as FetchEvent handler within the browser.

此页面显示了使用 Vite 创建项目的示例。

¥This page shows an example of creating a project using Vite.

1. 设置

¥ Setup

首先，创建并移动到你的项目目录：

¥First, create and move to your project directory:

mkdir my-app
cd my-app

为项目创建必要的文件。使用以下内容创建 package.json 文件：

¥Create the necessary files for the project. Make a package.json file with the following:

json

{
  "name": "my-app",
  "private": true,
  "scripts": {
    "dev": "vite dev"
  },
  "type": "module"
}

类似地，创建一个包含以下内容的 tsconfig.json 文件：

¥Similarly, create a tsconfig.json file with the following:

json

{
  "compilerOptions": {
    "target": "ES2020",
    "module": "ESNext",
    "lib": ["ES2020", "DOM", "WebWorker"],
    "moduleResolution": "bundler"
  },
  "include": ["./"],
  "exclude": ["node_modules"]
}

接下来，安装必要的模块。

¥Next, install the necessary modules.

npmyarnpnpmbun

npm i hono
npm i -D vite

yarn add hono
yarn add -D vite

pnpm add hono
pnpm add -D vite

bun add hono
bun add -D vite

2. Hello World

编辑 index.html：

¥Edit index.html:

html

<!doctype html>
<html>
  <body>
    <a href="/sw">Hello World by Service Worker</a>
    <script type="module" src="/main.ts"></script>
  </body>
</html>

main.ts 是一个用于注册 Service Worker 的脚本：

¥main.ts is a script to register the Service Worker:

function register() {
  navigator.serviceWorker
    .register('/sw.ts', { scope: '/sw', type: 'module' })
    .then(
      function (_registration) {
        console.log('Register Service Worker: Success')
      },
      function (_error) {
        console.log('Register Service Worker: Error')
      }
    )
}
function start() {
  navigator.serviceWorker
    .getRegistrations()
    .then(function (registrations) {
      for (const registration of registrations) {
        console.log('Unregister Service Worker')
        registration.unregister()
      }
      register()
    })
}
start()

在 sw.ts 中，使用 Hono 创建一个应用，并使用 Service Worker 适配器的 handle 函数将其注册到 fetch 事件。这允许 Hono 应用拦截对 /sw 的访问。

¥In sw.ts, create an application using Hono and register it to the fetch event with the Service Worker adapter’s handle function. This allows the Hono application to intercept access to /sw.

// To support types
// https://github.com/microsoft/TypeScript/issues/14877
declare const self: ServiceWorkerGlobalScope

import { Hono } from 'hono'
import { handle } from 'hono/service-worker'

const app = new Hono().basePath('/sw')
app.get('/', (c) => c.text('Hello World'))

self.addEventListener('fetch', handle(app))

3. 运行

¥ Run

启动开发服务器。

¥Start the development server.

npmyarnpnpmbun

npm run dev

yarn dev

pnpm run dev

bun run dev

默认情况下，开发服务器将在端口 5173 上运行。在你的浏览器中访问 http://localhost:5173/ 以完成 Service Worker 注册。然后，访问 /sw 以查看来自 Hono 应用的响应。

¥By default, the development server will run on port 5173. Access http://localhost:5173/ in your browser to complete the Service Worker registration. Then, access /sw to see the response from the Hono application.

服务工作线程 ​

1. 设置 ​

2. Hello World ​

3. 运行 ​

服务工作线程

1. 设置

2. Hello World

3. 运行